CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 7.5. It affects Exchange. It may lead to a denial-of-service condition.
CVE
CVE-2025-30194
Severity
HIGH
CVSS
7.5
EPSS
2.22%
Exchange
Original NVD Description
When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.